CVE-2021-31649: Jfinal JFinal Java Deserialization Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-h3j8-fr5q-8rfr
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CWE-502
Published
Advisory Summary

CVE-2021-31649 is a CRITICAL jfinal java deserialization vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Jfinal libraries in the Maven ecosystem. The issue involves jfinal java deserialization vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2021-31649 at a Glance

CVE Identifier CVE-2021-31649
GHSA Identifier GHSA-h3j8-fr5q-8rfr
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Jfinal
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2021-31649

To remediate this vulnerability, upgrade all affected Jfinal dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

com.jfinal:jfinal fixed: Latest secure release 
<dependency>
    <groupId>com.jfinal</groupId>
    <artifactId>jfinal</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=com.jfinal

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-31649, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.jfinal

Analyze the terminal output to locate any version of Jfinal in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.jfinal command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Jfinal, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In applications using jfinal 4.9.08 and below, there is a deserialization vulnerability when using redis which can lead to remote code execution

CVE-2021-31649 Affected Jfinal Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
com.jfinal:jfinal
maven/com.jfinal/jfinal
Maven
≤ 4.9.08

References

NVD — CVE-2021-31649 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31649
Jfinal Source Repository REPOSITORY
https://github.com/jfinal/jfinal/issues/184
note.youdao.com/noteshare WEB
http://note.youdao.com/noteshare?id=787ccbb8345dbd4a905aebe35f1d8aa8&sub=6C5C072C901949429EFD978405212FA4

Frequently Asked Questions

What is CVE-2021-31649?
CVE-2021-31649 is a security vulnerability in Jfinal involving JFinal Java Deserialization Vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Jfinal versions are affected?
Affected versions include releases prior to current release patches across affected packages: com.jfinal:jfinal.
What version fixes CVE-2021-31649?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is jfinal affected?
Yes, com.jfinal:jfinal is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2021-31649?
CVE-2021-31649 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2021-31649?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.jfinal'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h3j8-fr5q-8rfr",
  "modified" : "2023-07-11T16:45:32Z",
  "published" : "2022-05-24T19:06:05Z",
  "aliases" : [ "CVE-2021-31649" ],
  "summary" : "JFinal Java Deserialization Vulnerability",
  "details" : "In applications using jfinal 4.9.08 and below, there is a deserialization vulnerability when using redis which can lead to remote code execution",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.jfinal:jfinal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.9.08"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-31649"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jfinal/jfinal/issues/184"
  }, {
    "type" : "WEB",
    "url" : "http://note.youdao.com/noteshare?id=787ccbb8345dbd4a905aebe35f1d8aa8&sub=6C5C072C901949429EFD978405212FA4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-11T16:45:32Z",
    "nvd_published_at" : "2021-06-24T16:15:00Z"
  }
}